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                [Usaco2007 Jan]Cow School牛学校                </h1>
                <p>时间限制：5s&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;  空间限制：64MB</p>			</div>
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                                <h3>题目描述</h3><p><p><span style="font-size: medium">Bessy 正在上学并且分数还不错. 她考了N (一个数据中1 &lt;= N &lt;= 50,000, 其余数据 1 &lt;= N &lt;= 50,00) 次试,每次考试得分为T_i, 满分为P_i(0 &lt;= T_i &lt;= P_i &lt; 40,000; 0 &lt; P_i). 在计算总分时,她的老师先将把分数(P_i/T_i)最高的D个试卷去掉,然后将其余P_i 的和除以其余T_i的和作为Bessy的分数. Bessy精通数学,所以很快发觉这并没有想象中那么好. Bessy想告诉她的老师所有附和以下条件的D: 如果令一组(D个)分数去掉,她的分数回比老师算出来的更高. Bessy 很惊讶地发现她没有两次考试得分百分点是一样的. </span></p></p><hr/><h3>输入格式</h3><p><p><span style="font-size: medium">*第一行: N </span></p>
<p><span style="font-size: medium">*第2..N+1行: 第i行里有 T_i 和 P_i.</span></p></p><hr/><h3>输出格式</h3><p><p><span style="font-size: medium">* 第一行: K, 符合条件的D的个数. </span></p>
<p><span style="font-size: medium">*第2..K+1行: 按递增顺序,每行一个符合条件的D. </span></p></p><hr/><h3>样例输入</h3><pre>5
1 2
5 9
3 8
4 10
1 3

输入解释:

Bessy 考了5门试, 分数分别为1/2, 5/9, 3/8, 4/10, 1/3.
</pre><hr/><h3>样例输出</h3><pre>2
1
2

输出解释:

当D=1时, 去掉1/3将使总分变成13/29, 而去掉3/8则得到11/24.

当D=2时, 去掉1/3和3/8得到总分10/21. 更高的7/14则能由去掉3/8和4/10
得到.
</pre><hr/><h3>提示</h3><p>没有写明提示</p><hr/><h3>题目来源</h3><p>Gold</p>
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